<?php
/**
 * Application model for CakePHP.
 *
 * This file is application-wide model file. You can put all
 * application-wide model-related methods here.
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       app.Model
 * @since         CakePHP(tm) v 0.2.9
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */

App::uses('Model', 'Model');

/**
 * Application model for Cake.
 *
 * Add your application-wide methods in the class below, your models
 * will inherit them.
 *
 * @package       app.Model
 */
class AppModel extends Model {
    //for checking a field unique
    function isUnique($field = null, $value = null, $id = null)
   	 {
        $fields[$this->name.'.'.$field] = $value;
        if (empty($id))
            // add 
		$condition = $this->name.".".$field." = '".$value."'";
        else
            // edit
	$condition = '('.$this->name.".".$field." = '".$value."') AND (".$this->name.".id <> $id)";
      
        $this->recursive = -1;

        if ($this->hasAny($condition))
        {
            $this->invalidate('unique_'.$field); 
            return false;
        }
        else 
            return true;
   }
    
}
